The citizens of a tiny Cornish village are tormented during World War II by a headless ghost which is haunting the local tin mine.

Army Private Eddie Pratt smuggles his new bride into camp in hopes of having a happy wedding night. Instead they discover a murder. Colonel Rogers of Army Intelligence arrives to take over the case. The prime suspect, Jevries, is well-known to Rogers, who sets out to get a confession from Jevries even though there are plenty of other suspects.

A valuable gem from India is stolen in an old dark mansion and it is up to Scotland Yard inspector Charles Irwin to find out who did it among all the suspects who were in the house.

Suave French actor Philippe Martin provokes a scandal when, in a darkened theater, he mistakes young Monique for his mistress, Yvonne, and tries to kiss her. Charged with assault, the quick-thinking Philippe claims it's French tradition to do as he did, and is let go. To his surprise, Philippe learns that Monique has paid his fine. As the tabloids exploit the situation, Monique dates Philippe, until a photo appears of him kissing Yvonne.

Occupants of a London boarding house become suspects as a string of murders are discovered.

The stooges are sailors working in a ships' tailor shop. When they can't get passes to go ashore, they steal officers uniforms and go to a party with Curly passing himself off as Admiral Taylor and Moe and Larry as his aides. Two spies, one of them a beautiful woman, trick the stooges into stealing a new submarine. The boys turn the table on the spies and capture them. When the real Admiral shows up, Curly's reenacts the capture and accidentally detonates a bomb, blowing them all to kingdom come.

Barbers Willy Nilly and Hercules Glub have opened a barbershop in an Indian reservation, where they have no customers. When suddenly a white man asks for a shave, several Indians of the Oopadoop nation also enter, hearing the usual barbershop banter about foreign debts, they force them to be ambassadors of their nation at the Peace conference in Geneva. Ammunition industry executive Winkelreid is scheming to prevent their mission becoming an success, but the vamp Dolores aboard the ship fails, falling in love with Nilly, and so does Fifi, the toughest person of the world in Paris, falling for Glub. Although Winkelreid is able to steal their secret papers, Nilly and Glub don't give up after being reminded by constant observation of their Indians and enter the Peace conference, which turns out to be a battlefield...